iPhone:

The app's interface provides you with quick access to everything you could possibly need. Plus, it looks pretty neat thanks to backgrounds that match your album art. You're able to browse through your music as a list or carousel, and control playback with common gestures. The app also includes detailed song information like play counts and and release dates, access to song lyrics, portrait and landscape support, and the ability to share what you're listening to via Facebook, Twitter, or email.
iMusic - The Perfect Music Player is available for free today only (12/15). It has a 3.5-star rating with a total of 70 ratings.

Choose from a list of 27 different categories, select two units, and then enter your values to have them instantly converted. You're able to copy values and paste them into other apps. The app also includes up-to-date currency exchange rates, a total of 630 units, a scientific view, and the ability to save your favorite categories for quick access.
iUnit 2 - Unit and Currency Converter is available for free for a limited time. It has a 4.5-star rating with a total of 64 ratings.

Just put your fingers to the screen and start typing. With Fleksy keyboard support enabled, you won’t even have to peek at the keys since it can figure out exactly what you meant to type. If the suggestion isn’t correct, just swipe down on the keyboard to pick the next. While you’re typing away your document will be saved. You’re able to stash your notes within folders, archive them, or share them in PDF or HTML form. The app also includes the ability to favorite note, Markdown support, TextExpander support, Dropbox and Evernote integration, passcode lock, and the ability to post directly to Tumblr, Wordpress, and Blogger.
Wordbox - Simple Beautiful Text Editor is available for free today only (12/15). It has a 4-star rating with a total of 16 ratings.

Strides supports four types of goal trackers to allow for extreme flexibility: target, consecutive, average, and milestones. If you need some inspiration coming up with one, don’t worry, there’s a built in list of over 300 tracker ideas. When creating a tracker, you’re able to add specific values, progress dates, and reminders. Then just get to it and start leveling up!
Strides: Goals & Habits Tracker - SMART Goals, New Years Resolutions, Goal Setting, Habit Tracker, Goal Tracker & Quantified Self Tracking Tool with Reminders is available for free today only (12/15). It has a 4.5-star rating with a total of 22 ratings.

Universal:

Phases of the Moon ($1.99 → Free, 60.4 MB): Discover the current phase of the Moon with this highly accurate weather app.

You’re able to see the current phase of the moon in visual form accompanied by the phase name, illumination percentage, distance to the Earth, and the Moon age. If you swipe left or right, you can jump forwards and backwards in time. Tap the calendar button in the top left corner of the screen to discover the next full moon, or tap the monthly button in the bottom right corner to see phases for each and every day. If you pinch and zoom in on the Moon, you can view more detailed information. The app also includes zodiac signs, the ability to play through phases as an animation, and the ability to share phases via email, Twitter, Facebook, Messages, or AirDrop.
Phases of the Moon is available for free for a limited time. It has a 5-star rating with a total of 355 ratings.

Heroes of Dragon Age ($9.99 → Free, 67.6 MB): Today Only: Receive an exclusive Dark Revenant, three free heroes, and six runes after you complete the tutorial.

Become a legend of Dragon Age in this turn-based strategy game. You must assemble a powerful squad of characters to take on the evil that lurks in the Dragon Age universe. You’ll have to develop a nearly perfect strategy of attacks and defenses while also highlighting each squad member’s best attributes to defeat the most powerful of enemies. Take on epic quests and defeat bosses to earn and collect new characters. The game includes literally hundreds of 3-D characters, story lines and locations from the original franchise, and achievements and leaderboards via Game Center.
Heroes of Dragon Age is available for free today only (12/15). It has a 4.5-star rating with a total of 4128 ratings.

Sticky Memos Pro ($2.99 → Free, 12.3 MB): Keep track of all of your important ideas and events with this colorful productivity app.

You’re able to create an unlimited number of sticky notes. Each note can include a title, an endless amount of content, priority level, and alarm if necessary. You’re also able to highlight it with a little color. All of the notes on the main screen can then be sorted alphabetically or by priority level, and you can even choose to hide specific colors. The app also includes the ability to adjust the size of your notes, iCloud support, two text color options, and the ability to snap a screenshot.
Sticky Memos Pro is available for free today only (12/15). It has a 4.5-star rating with a total of 218 ratings.

iPad:

Geography Drive USA™ ($3.99 → Free, 72.2 MB): Join your kids and take a trip across the United States in this educational app.

To ensure you have enough fuel to make it coast-to-coast, you’ll have to correctly answer questions regarding states and their shapes, capitals, nicknames, flags, key symbols, and so much more. You can also take a chance on a bonus delivery and earn cash to upgrade your ride. Just keep an eye on your fuel the whole time, because the bottom of the tank means the end of the road. The game includes customizable cars and garage signs, support for multiple players, 50 state brochures, and 600 questions.
Geography Drive USA™ is available for free today only (12/15). It has a 4.5-star rating with a total of 44 ratings.

That concludes today's issue of Apps Gone Free. If you like staying on top of these daily deals, don't forget to check out our free AppsGoneFree app. It provides all the deals each day, and even an archive of past deals that are still active.

Developers:

If you are a developer who would like to get your app included in our “Apps Gone Free” daily lists, here’s our basic set of rules:

It must have at least a three-star average rating at the time it goes free.

The app must not have been free numerous times (3+) over the last six months.

The free version of your app must not include ads.

To submit an app, simply send a request to [email protected] with the subject “Apps Gone Free.” Please include the name of the app, a link to it in the App Store, when and for how long you intend to offer the app for free, and anything else you would like to share. We will take it from there.